浙江省玄武岩母质土壤地球化学特征与开发利用关系的研究

玄武岩母质土壤肥力高,适于培植多种优质高产作物,是一种长期被忽视的重要土壤资源。在不同地球化学演化阶段的3种土壤类型上,开发利用条件有明显差别。弱风化淋溶的幼年土壤,多种营养元紊及其它肥力因子均较优越,具有更大的开发利用潜力。土壤高度富集氧化铁,含量为20.75％(n=23),游离态达9.08(n=18)。因此土壤“假砂”结构尤其发育,对开发利用有多种特殊影响。不同地质层位、岩性和新构造运动影响下的玄武岩母质土壤,地球化学变异很大,与合理开发利用关系密切,但以往对其重要性认识不够。

A STUDY OF THE RELATIONSHIP BETWEEN GEOCHEMICAL CHARACTERISTICS OF THE BASALTIC SOILS IN ZHEJIANG PROVINCE AND ITS EXPLOITATION AND UTILIZATION

The basaltic soils are an important soil resource that has been overlooked for a long time. It is revealed that these soils have excellent fertility and good quality and can make many crops grow well. There are three types of basaltic soils. They are in different geochemical evolution stages and have great differences in the conditions of exploitation and utilization. Among them the soil with weak weathering has great exploitable potentiality according to contents of many nutritive elements and other factors of fertility. The content of total Fe2O3 reaches 220.75% (n = 23) and the amorphous Fe2O3 amounts to 9.08% (n = 18) in the soils. Consequently, soil structure similar to sand in the surface layer develops obviously and leads to exceptional effects on soil exploitation and utilization. It warrants careful consideration that soils derived from different geological horizons, different rocks properties and different new tectonic movements have significant geochemical variations and influences on the exploitation and utilization. But up to now the extent of the influence is little known.